PCF8545 datasheet(20/68 Pages) NXP

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NXP Semiconductors

PCF8545

Universal LCD driver for multiplex rates up to 1:8

7.3 Possible display configurations

The PCF8545 is a versatile peripheral device designed to interface between any

microcontroller to a wide variety of LCD segment or dot matrix displays (see Figure 10). It

can drive multiplexed LCD with 4, 6, or 8 backplanes and up to 44 segments.

The display configurations possible with the PCF8545 depend on the required number

of active backplane outputs. A selection of possible display configurations is given in

Table 21.

7-segment with dot

14-segment with dot and accent

013aaa312

dot matrix

Figure 10. Example of displays suitable for PCF8545

Number of

Digits/Characters

Backplanes

Segments

Icons

7 segment[1]

14 segment[2]

Dot matrix/

Elements

320

252

176

Table 21. Selection of display configurations

[1]

7 segment display has 8 elements including the decimal point.

[2]

14 segment display has 16 elements including decimal point and accent dot.

All of the display configurations in Table 21 can be implemented in the typical systems

shown in Figure 11 and Figure 12.

PCF8545

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 4 October 2021

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PCF8545 Datasheet(PDF) 20 Page - NXP Semiconductors